基于非线性平均场模型,在核子自能中引入蝌蚪图的修正,从而在平均场模型中引入费米子海的贡献,得到核子在介质中的有效质量以及核物质在高密度区域的状态方程.核子自能中的蝌蚪图的贡献,使得核子在介质中的有效质量下降变缓,并最终使得高密核物质的状态方程变硬.
Based on the nonlinear mean field model,the tadpole diagram in the self-energy of nucleon is introduced to concern the contribution of Fermi sea. The effective nucleon masses and the state of equation for high density nuclear matter are obtained. The tadpole diagram leads to slowing down the reducing trend of the effective nucleon masses and the equation of state for high density nuclear matter becoming stiffer.